I took for granted that if you teach the topic you should know the answers, but alas i may be incorrect. I let a colleague use it and I was asked for a key so I am including one with it.
I use many sources to make test and use not only my own original questions but questions I find as I teach the lesson and through out the year.
If you are looking for something specific I am more than happy to post what I have or send to you; just let me know!!!